Add should-skip-ci step in ci.yaml

Author: VeckoTheGecko

.github/workflows/ci.yml

@@ -20,14 +20,32 @@ env:
   PIXI_VERSION: "v0.63.0"
 
 jobs:
+  should-skip-ci:
+    name: should skip ci
+    runs-on: ubuntu-latest
+    if: |
+      github.repository == 'Parcels-code/Parcels'
+      && (github.event_name == 'push' || github.event_name == 'pull_request')
+    outputs:
+      value: ${{ steps.check-skip.outputs.trigger-found == 'true' || contains(github.event.pull_request.labels.*.name, 'skip-ci') }}
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 2
+      - uses: xarray-contrib/ci-trigger@v1
+        id: check-skip
+        with:
+          keyword: "[skip-ci]"
+
   cache-pixi-lock:
     uses: ./.github/workflows/cache-pixi-lock.yml
     with:
       pixi-version: "v0.62.2" # keep in sync with env var above
   unit-test:
     name: "Unit tests: ${{ matrix.os }} | pixi run -e ${{ matrix.pixi-environment }} tests"
     runs-on: ${{ matrix.os }}-latest
-    needs: [cache-pixi-lock]
+    needs: [should-skip-ci, cache-pixi-lock]
+    if: needs.should-skip-ci.outputs.value == 'false'
     env:
       COVERAGE_REPORT: "${{ matrix.os }}_${{ matrix.pixi-environment }}_unit_test_report.html"
     strategy:
@@ -91,11 +109,12 @@ jobs:
           name: Unittest report ${{ matrix.os }}-${{ matrix.pixi-environment }}
           path: ${{ env.COVERAGE_REPORT }}
   integration-test:
-    # TODO v4: Re-enable the workflow once development has stabilized and we want to run integration tests again
-    if: false
     name: "Integration: ${{ matrix.os }} | pixi run -e ${{ matrix.pixi-environment }} tests-notebooks"
     runs-on: ${{ matrix.os }}-latest
-    needs: [cache-pixi-lock]
+    needs: [should-skip-ci, cache-pixi-lock]
+    # TODO v4: Re-enable the workflow once development has stabilized and we want to run integration tests again
+    # needs.should-skip-ci.outputs.value == 'false'
+    if: false
     env:
       COVERAGE_REPORT: "${{ matrix.os }}_${{ matrix.pixi-environment }}_integration_test_report.html"
     strategy:
@@ -150,10 +169,11 @@ jobs:
           pattern: "* report *"
   typechecking:
     name: "TypeChecking: pixi run typing"
+    runs-on: ubuntu-latest
+    needs: [should-skip-ci, cache-pixi-lock]
     # TODO v4: Enable typechecking again
+    # needs.should-skip-ci.outputs.value == 'false'
     if: false
-    runs-on: ubuntu-latest
-    needs: [cache-pixi-lock]
     steps:
       - name: Checkout
         uses: actions/checkout@v5